Hull for hydroplanes or boats



C. RUHE( HULL FOR HYDROPLANES 0R BOATS. APPLICATION FILED DEC. 13. 1917. RENEWED AUG. 9, 1919.

1,818,413., Patented 0%.141919.

3 SHEETSSHEET 1,.

c. RUHE. HULL FOR HYDROPLANES 0R BOATS.

Patented Oct. 14, 19I9.

awucntoz Carleton Fake,

Chimney RENEWED AUG. 9. I919.

3 SHEETS-SHEET 2.

APPLICATION FILED DEC. I3, I9l7.

HULL FOR HYDROPLANES 0R BOATS.

APPLICATION FILED DEC. I3, 1917- RENEWED AUG. 9. I919.

1,318,413. Patented 001. 14,1919.

3 SHEETS-SHEET 3- avmmvltoz 62726207? fiaka CARLETON BUHE, OF CLEAN, NEW YORK.

HULL FOB HYDROPLANES OR BbATS.

Specification of Letters Patent.

Patented ct. 14, 1919.

Application filed December 13, 1917, Serial No. 206,851. Renewed August 9, 1919. Serial-No. 316,492.

To all whom it may concern:

Be it known that I, CARLETON RUHE, a

citizen of the United States, residing at new and useful Improvements in Hulls for Hydroplanes or Boats, of which the following is a specification.

My invention relates to improvements in the hull of a hydroplane or boat.

An important object of the invention is to so construct the hull that its action upon the water, with increased speed of the hull, tends to raise or elevate the hull, thereby decreasing the extent of contact between the hull and the water and correspondingly reducing the friction between the same.

A further object of the invention is to provide a hull of the above mentioned character, having means to prevent, to a large plxtent, pounding of the water upon the ull.

A further object of the invention is to provide a hull of the above mentioned character, which is of simplified construction, strong, and durable.

Other objects and advantages of the invention will be apparent during the course of the following description.

I In the accompanying drawings forming a part of this specification and in which like numerals are employed to designate like parts throughout the same,

Figure 1 is a side elevation of a hull of a hydroplane embodying my invention,

Fig. 2 is a central vertical longitudinal sectional view through the same,

Fig. 3 is a bottom plan view of the same,

Fig. 4 is a transverse sectional view taken on line 44 of Fig. 1,

Fig. 5 is a similar view taken on line 5 of Fig. 1, a

Fig. 6 is a plan view of the hydroplane,

Fig. 7 isan elevation of the forward end of the hydroplane,

Fig. 8 is a similar view of the rear end thereof, and,

Fig. 9 is a diagrammatic view illustrating the cross-sectional shapes of the forward portion of the hull.

In the drawings, wherein for the purpose of illustration is shown a preferred embodiment of my invention, the numeral 10 designates the hull, as a'whole. This hull is preferably covered by a top 11, having an opening 12, for the passage of the engine,

and a rear opening 13, for the reception of the operator or operators.

The forward portion of the hull is designated by the numeral 14 and the lower portion or bottom 15 of this forward portion embodies oppositely arranged downwardly converging Walls 16, which are curved in cross-section, with their concave faces arranged outermost, as shown. The bottom portion 15 tapers in a horizontal plane, forwardly, and consequently decreases in width or vertical cross-sectional area, in a forward direction. The outer edge of the transversely curved walls 16 therefore gradually approach each other toward the forward end of the bow of the hull, the angle between the walls 16 decreasing, whereby the forward portion of the boat is sharper, and is adapted to out the water, while the rear portion of the bottom portion 15 is adapted to function more as sustaining means. This construction is shown diagrammatically in Fig. 9, wherein a plurality of cross-sections of the bottom portion 16 are shown. As clearly shown in Fig. 9, the concavity of the walls 16 increases forwardly.

The numeral 17 designates the rear bottom portion of the hull, which is off-set upwardly from the forward bottom ortion 15, as shown. The bottom portion 1% embodies a bottom wall 18, which is curved in crosssection, clearly shown in Fig. 5, with its concave surface arranged lowermost. The curved bottom portion 18 increases in width rearwardly, as clearly shown in Fig. 3.

Secured to the opposite sides of the upper portion of the hull are air sustaining wings or fins 19, arranged above the water line, and rigidly secured thereto by any suitable means.

Suitably connected with the rear end or stern of the hull is a rudder 20', of any well known or preferred construction.

I provide propelling means for the hull, comprising three Water propellers 21, arranged at the rear end of the hull and driven by shafts 22. The outer propellers 21 are rotated in opposite directionswhile the inner propeller may berotated in the direction of either outer propeller.

Arranged near the rear end of the hull and above the water-line are air propellers 23, rigidly secured to shafts 24E, journaled through bearings 25. The shafts 24 are rotated in opposite directions by any suitable means.

I The operation of the apparatus is as follows: I

When the hull is propelled forwardly, there is a tendency for the forward end of the hull to extend upwardly due to the hull tipping transversely upon the rear end of the forward bottom portion 15. As the speed of the hull increases, the curved walls 16 act upon the water, in a manner to cause the hull to gradually rise in the water, thereby reducing the extent of contact between the hull and the water, with a corresponding reduction in the'friction. The sustain ing planes or fins 19, also coact in elevating the hull. I have found that the peculiar shape of the transversely curved walls 16 is adapted to prevent, to a high degree, the pollilnding of the water or waves, upon the hu It is to be understood that the form of my invention herewith shown and described is to be taken as a preferred example of the same, andthat various changes in the shape, size, and arrangement of parts may be resorted to without departing from the spiritof the invention or the scope of the subjoined claims.

'Having thus described my invention, 1'

. said rear portion being offset upwardly with respect to the forward portiom 2. A hull for a hydroplane or boat comprising a forebody whose lower portion is approximately V-shaped in cross section, decreasing in width downwardly, said lower portion having itssides curved in cross section with the concaved faces thereof arranged outwardly and the concavity of said faces extending in a continuous curve from the rear of the forebody to the bow and inv creasing forwardly, and an afterbody whose lower-portion is offset upwardly a substantial distance with respect to the lower portion of the forebody.

3. A hull for a hydroplane or boat comprising'a forebody whose lower portion is approximately V-shaped in cross section,

decreasing in width downwardly, said lower portion having its sides'curved in cross section with the concaved faces thereof arranged outwardly, the concavity of said sides extending in a continuous curve from the rear of the forebody to the bow and inportion having its sides curved in cross section, with the concaved faces thereof arranged outwardly and an afterbody whose bottom is olfset upwardly wholly above the level of the lower portion of the forebody.

5. A hull fora hydroplane or boat comprising a forebody whose lower portion is approximately V-shaped in, cross section, de creasing in width downwardly, said lower portion having its sides curved in cross section with the concaved faces thereof arranged outwardly and an. afterbody whose bottom is offset upwardly wholly above the level of the lower portion of the forebody. 6. Ahull for a hydroplane or boat comprising a forebody whose lower portion is approximately V-shaped in I cross section,

decreasing in width downwardly, said lower portion having its sldes curved in cross section with the concaved faces arranged outwardly, the concavity of said sides increasing forwardly, said forebody having its keel extending upwardly toward the bow, and an afterbody whose bottom portion is offset up wardly wholly above the level of the lower portion of the forebody.

7. A hull for a hydroplane or boat comprising a forebody whose upper portion has sides approximately parallel in cross section and a lower portion approximately -V- shaped in cross section decreasing in width downwardly and extending from the lower edges of said sides to the keel, said lower portion having its sides curved in cross section with the concaved faces thereof arranged outwardly, the said keel extending upwardly toward the bow and the lower edges of the said curved sides being joined at the said keel, and an afterbod whose' bottom is offset upwardly wholly a ove the level of the lower portion of the forebody.

8. A hull for a hydroplane or boat comprising a forebody whose lower portion is approximately V-shaped in cross section, de-' creasing in width downwardly, said lower portion having its sides curved in cross section with the concaved faces thereof arranged outwardl and-an afterbody having a substantially at bottom ofi'set upwardly with respect to the lower portion of the forebody, the bottom of the afterbody being provided longitudinally thereof with an upwardly curved section.

9. A hull for a hydroplane or boat com- I prising a forebody having an upper portion with sides approximately parallelin cross section but converging forwardly and meet a ing at the bow,

ingthe 7 said sides decreasing in width forwardly, the lower edges thereof being curved upwardly forwardly and meet ugper edges thereof at the bow and said fore ody having a lower portion approximately V-shaped in cross section, de-* creasing 1n wldth downwardly, having the lower edges of its sides joined at the keel and extending upwardly therefrom in a curve having its concaved faces arranged 1o outwardly to the lower edges of the sides of the said upper portion and an afterbody havinga bottom ofiset upwardly with respect to the lower portion of the forebody.'

In testimony whereof I aifix my signature. 15

' "CARLETON RUHE. 

